In China, it is usually planted in June 10 ~ February 12, and can be harvested in June10 ~ March of the following year. Of course, if climatic conditions permit, potatoes can be planted all year round in theory, and the specific planting time depends on the local climate.

From the middle and late April to the beginning of May, this period is suitable for planting potatoes in the northeast and some northwest areas such as Gansu and Qinghai, and harvesting in autumn. Usually only one season can be planted in a year, so it is called one-season planting area in the north and northwest.

Shandong, Hebei, Henan, Shanxi, Jiangsu, Hunan, Hebei and so on. Spring potatoes are planted in February and March in Central Plains areas such as Shandong and Hebei, and harvesters are used in June and July. Autumn potatoes are sown in August and harvested in1early October 10-165438+.

Jiangsu, Zhejiang and other central and southern provinces can plant spring potatoes in1~ February and harvest them in May ~ June. It is sown in September and harvested in February in autumn. These areas are called the Central Plains and the Central and South China.

Guangdong, Guangxi, Hainan, Yunnan, Guizhou and other places can plant one-season potatoes in the gap between rice harvest in autumn. Generally, it is sown in the middle and late June of 65438+ 10 ~/kloc-0+10, and harvested in February and March of the following year. Because the growing season is mostly in winter, these areas are usually called southern winter agricultural areas.

In addition, when potato tuber is propagated asexually, seed potato can germinate and grow at soil temperature of 5 ~ 8℃, and the optimum temperature is 15 ~ 20℃. The suitable temperature for the growth and flowering of plant stems and leaves is 16 ~ 22℃. The optimum temperature for tuber formation at night is 10 ~ 13℃ (soil temperature is 16 ~ 18℃), and it forms slowly when it is higher than 20℃. When the temperature drops to -2℃, it will be frozen.